Working with temperature conversion

Which is the correct answer.

During an evening news broadcast in Helsinki, Finland, the meteorologist indicated that the day's lowest temperature was -4.0 °C. What is the corresponding value of this temperature on the Fahrenheit scale?

A -7.2 °F
B -4.0 °F
C 17 °F
D 25 °F
E 39 °F

Complete the following statement: Bimetallic strips used as adjustable switches in electric appliances consist of metallic strips that must have different.